Drawing frame and clearer system therefor



1958 J. 5. DUDLEY ET AL 2,

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Filed March 6, 1956 2Sheets-Sheet 1 (D N a Q m INVENTORS. if, JOHN S. DUDLEY,

WILLIAM J. LANGLOIS 8.

JOSEPH H L. ROY.

ATT'Y.

1958 J. s. DUDLEY ET AL 2,862,249

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Filed March 6, 1956 2Sheets-Sheet 2 W/// 7N J r I IN I'I-INTORS.

Fl q. 2 JOHN s. DUDLEY WILLIAM J. IIANGLOIS & BY JOSEPH H. L. ROY.

DRAWING FRAME AND CLEARER SYSTEM THEREFOR Application March 6, 1956,Serial No. 569,742

2 Claims. (Cl. 19-139) This invention relates to machines for drawingtextile fibers preliminary to spinning and twisting operations. Morespecifically, the invention relates to improved pneumatic apparatus forremoving fly and lint from the drawing rolls and for collecting andholding the waste material.

Machines are known in which lint and fly are thus removed by pneumaticclearing apparatus, and it is the general object of this invention toimprove the drawing frames and'the pneumatic clearing apparatusassociated therewith in such manner that less power is consumed, moreuniform and more satisfactory operation is attained, and that neitherthe surrounding floor space nor the over-all dimensions of themachineare increased.

We also provide a construction by which a drawing frame can be builtdouble and with separate roll driving mechanism at both ends of themachine, and with the pneumatic clearer apparatus disposed in a centraland otherwise comparatively unobstructed space, well removed from alldriving mechanism.

We also provide a machine in which the lint-collecting ducts are onlyone-half as long as were previously required in machines of equalcapacity. Lower and more uniform air exhaust may thus be utilized.

Our invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims.

A preferred form of the invention is shown in the drawings, in whichFig. 1 is a front elevation of our improved machine; and

Fig. 2 is an enlarged partial transverse section of the machine, takenalong the irregular line 22 in Fig. 1.

Referring to Fig. 1, we have shown a double drawing frame having fourdrawing heads 10 at the right-hand end of the machine and which aredriven from the motor M through suitable driving connections 12 whichare mounted in the end frame member 14. Four additional drawing heads10a are mounted in the left-hand portion of the machine, and the heads10a are driven by a motor M through suitable driving connections 15 inthe opposite end frame member 16.

The end frame members 14 and 16 are connected by a longitudinal framemember 20 which is supported at its middle point by a center framemember 22. Lower cross girts 23 and 24 are provided between the framemembers 14 and 22 and 16 and 22, respectively.

Tables 25 and 26 are mounted in front of the girts 23 and 24 to supportthe roving cams, and these tables may be moved in closed paths inhorizontal planes by any suitable mechanism, such as that shown inHendrickson Patent 2,355,071 issued August 8, 1944.

All of the drawing heads 10 and 10a are duplicates, and one of theseheads is shown in section in Fig. 2. Referring to Fig. 2, the drawingmechanism comprises back rolls 30 and 31 mounted in adjustable bearingUnited States Patent blocks 32, intermediate rolls 40, 41 and 42 mountedin adjustable intermediate bearing blocks 44, and front rolls 50, 51, 52and 53 mounted in fixed bearing members 55. All of the bottom rolls 30,40, 42, 50 and 52 are rotated in predetermined speed relation by themotors M and M and the driving connections 12 and 15, as shown in Fig.1.

All of the upper rolls 31, 41, 51 and 53 are rotated by frictionalengagement with the driven lower rolls. The back and intermediatebearing blocks 32 and 44 may be adjusted forward and back to provide thedesired spacing between the rolls.

Arms 57 (Fig. 2) are pivoted at 58 and may be pressed downward to applyyielding pressure to the top drawing rolls through any usualconnections.

The arrangement of the drafting rolls and the driving connections andadjustable bearings therefor form no part of the present invention,which relates particularly to the clearing of fly, lint or other wastefrom the drafting rolls.

For this purpose, we provide clearer devices 60, 61 and 62 for the upperrolls 53, 51 and 41. The members 60, 61 and 62 for each drafting headare vertically adjustable in a separate collecting chamber or'hood 70,mounted to swing about a fixed pivot 71 and extending forward over theassociated top rolls. No clearers are provided for the back rolls 30 and31, asfly and lint does not commonly collect on these rolls.

Exhaust passages 72, 73 and 74 are formed in depending portions 75, 76and 77 of each hood or collecting chamber 70. The portions 75 and 76 arefixed with respect to the hood 70 but the portion 77 has a boltand-slotconnection thereto, permitting the portion 77 to be adjusted forward andback with the intermediate bearing block 44.

The hood or collecting chamber 70 has an end portion 80 which extendsthrough an opening 81 into an upper header 82 which extends at the rearof a group of drawing heads, as 10 or 10a. The upper header 82 isconnected by a down pipe 84 to a lower header 85, which in turn isconnected through an opening 86 to the upper part of a chamber 87 formedin the hollow center support 22.

A screen 90 (Fig. 1) is mounted in one side wall of the center support22, and air is exhausted from the chamber 87 by a fan 92 rotated by amotor M2. The exhausted air is discharged through a pipe 93 and throughan opening in the upper surface of the lower girt 23. This air is thenreturned to the atmosphere through a suitable directing bafflestructure.

The fly, lint and other waste material which is separated from the airdrawn from the clearer devices by the screen 90 is deposited in thechamber 87, from which it may be removed through a door 96.

Clearers and 101 are provided for the bottom rolls and are connectedthrough passages 102 and 103 to a lower collecting chamber 104, the openend of which extends through a discharge pipe 106 to the lower header 85previously described.

The collecting chamber 104 is held in raised or operative position by abrace 110, which may be moved manually to engage a stop 112. The rearexhaust passage 103 is formed in an upwardly projecting member 114having a bolt-and-slot connection for forward and back adjustment, aspreviously described.

With the construction above described, provision is made for connectinga single exhaust apparatus, such as the fan 92, to remove all of the flyor lint and other waste material from two separate sets of drawingheads, as 10 and 10a, and with the use of relatively short upper andlower headers for each group of drafting heads.

removed to the collecting chamber 87, and reduced suction or exhaustpressure may be used.

' It will also be noted that the exhaust apparatus, comprising the fan92, motor M2 and discharge pipe 93, are located in a relativelyunobstructed space between the end frame 14 and the center frame 22, sothat there is no interference with the roll-driving mechanism, and sothat the floor space and outside dimensions of the machine may remainunchanged.

Having thus described our invention and the advantages thereof, 'we donot wish to be limited to the details herein disclosed, otherwise thanas set forth in the claims, but what we claim is:

1. A drawing frame comprising two axially-aligned series of drawing rollunits, a supporting frame for all of said units, said frame comprisingtwo full-height upright and'spaced end'frame sections and a hollowpartheight upright middle frame section, said end frame sections beingconnected by a cross member which overlies and is supported-by saidmiddle frame section, separate roll driving mechanism in each spaced endframe section to drive the adjacent series of drawing roll units, aseparate motor to drive each separate roll-driving mechanism, a separateset of pneumatic clearer apparatus for the drawing rolls of each seriesof units, direct exhaust connections from each set of clearer apparatusto said hollow middle frame section, a single common air-exhaustingmechanism mounted adjacent one side of said hollow middle frame memberand connected to 30 exhaust air from both sets of clearer apparatusthrough said hollow frame member and said exhaust mechanism, a dischargeoutlet passage for the exhausted air, and means to screen the wastematerial from the air as it approaches said common air-exhaustmechanism, and said exhaust mechanism and said discharge outlet passagebeing located in the unobstructed space beneath the drawing roll unitsand between said hollow middle frame section and one of said end framesections.

2. In a machine having two separate series of drawing roll units, asupporting frame for said units comprising cross girts, upright andspaced end frame sections and a hollow upright middle frame section,separate driving mechanism for each series, a pneumatic rollclearerdevice for each drawing roll unit, a common airexhaust conduit systemassociated with all the rollclearer devices in said machine butseparately connected to each series and including the hollow uprightmiddle frame section, and suction means for said air-exhaust conduitsystem mounted adjacent said hollow middle frame member and incommunication therewith and effective to exhaust the air from all of thedrawing roll units in both series through said hollow middle framesection to atmosphere.

References Cited in the file of this patent UNITED STATES PATENTS2,147,190 Cadden Feb. 14, 1939 2,719,335 Buchanan Oct. 4, 1955 FOREIGNPATENTS 1,014,922 France June 25, 1952

